[TUT] How to root,backup and install Super Su in Alcatel Flash Plus

[TUT] How to do a full system back-up, root and install SuperSU instead of KingUser

(Note: KingRoot is different from KingUser. KingUser will appear after you’ve successfully rooted your phone using KingRoot. Once finished rooting, you can uninstall KingRoot right away and also uninstall that weird Chinese app with a Trident logo. Leave KingUser alone for the time being.)